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    SubjectRe: linux-2.4.9: atomic_dec_and_lock sometimes used while not defined
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    >>>>> " " == Adam J Richter <adam@yggdrasil.com> writes:
    >> If I try to build a kernel that can do SMP and run on a 386,
    >> the linux-2.4.9 NFS client gets compiled with an undefined
    >> reference to atomic_dec_and_lock().

    Bummer I found the bug. It's not a missing define, but a missing
    export...

    Cheers,
    Trond

    diff -u --recursive --new-file linux-2.4.9.orig/lib/Makefile linux-2.4.9/lib/Makefile
    --- linux-2.4.9.orig/lib/Makefile Wed Apr 25 22:31:03 2001
    +++ linux-2.4.9/lib/Makefile Fri Aug 17 11:52:35 2001
    @@ -16,6 +16,7 @@
    obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o

    ifneq ($(CONFIG_HAVE_DEC_LOCK),y)
    + export-objs += dec_and_lock.o
    obj-y += dec_and_lock.o
    endif

    diff -u --recursive --new-file linux-2.4.9.orig/lib/dec_and_lock.c linux-2.4.9/lib/dec_and_lock.c
    --- linux-2.4.9.orig/lib/dec_and_lock.c Sat Jul 8 01:22:48 2000
    +++ linux-2.4.9/lib/dec_and_lock.c Fri Aug 17 11:55:02 2001
    @@ -1,3 +1,4 @@
    +#include <linux/module.h>
    #include <linux/spinlock.h>
    #include <asm/atomic.h>

    @@ -34,4 +35,6 @@
    spin_unlock(lock);
    return 0;
    }
    +
    +EXPORT_SYMBOL(atomic_dec_and_lock);
    #endif
    -
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